Statistically uniform intra-block refresh algorithm for very low delay video communication

This paper focuses on the mechanism underlying the overall delay of a real-time video communication system from the time of capture at the encoder to the time of display at the decoder. A detailed analysis is presented to illustrate the delay problem. We then describe a statistically uniform intra-b...

Full description

Saved in:
Bibliographic Details
Published inFrontiers of information technology & electronic engineering Vol. 14; no. 5; pp. 374 - 382
Main Authors Song, Rui, Wang, Yang-li, Han, Ye, Li, Yun-song
Format Journal Article
LanguageEnglish
Published Heidelberg SP Zhejiang University Press 01.05.2013
Springer Nature B.V
Subjects
Algorithms
Communications Engineering
Communications systems
Computer Hardware
Computer Science
Computer Systems Organization and Communication Networks
Delay
Electrical Engineering
Electronics and Microelectronics
Instrumentation
Networks
Signal to noise ratio
Video communication
Video coding
Low delay
TN919
Intra refresh
Online AccessGet full text

Cover

More Information
Summary:This paper focuses on the mechanism underlying the overall delay of a real-time video communication system from the time of capture at the encoder to the time of display at the decoder. A detailed analysis is presented to illustrate the delay problem. We then describe a statistically uniform intra-block refresh scheme for very low delay video communication. By scattering in- tra-blocks uniformly into continuous frames, the overall delay is significantly decreased, and object changes in the scene could bc presented to the end user instantly. For comparison, the overall delay and the peak signal-to-noise ratio （PSNR） performance are tested. The experiment results show that an average of approximately 0.1 dB PSNR gain on average is obtained relative to random intra-macroblock refresh algorithm in H.264 JM, and the end-to-end delay performance is significantly improved.
Bibliography:Video coding, Intra refresh, Low delay
Rui SONG, Yang-li WANG, Ye HAN, Yun-song LI （State Key Laboratory of lntegrated Service Networks, Xidian University, Xi＇an 710071, China）
This paper focuses on the mechanism underlying the overall delay of a real-time video communication system from the time of capture at the encoder to the time of display at the decoder. A detailed analysis is presented to illustrate the delay problem. We then describe a statistically uniform intra-block refresh scheme for very low delay video communication. By scattering in- tra-blocks uniformly into continuous frames, the overall delay is significantly decreased, and object changes in the scene could bc presented to the end user instantly. For comparison, the overall delay and the peak signal-to-noise ratio （PSNR） performance are tested. The experiment results show that an average of approximately 0.1 dB PSNR gain on average is obtained relative to random intra-macroblock refresh algorithm in H.264 JM, and the end-to-end delay performance is significantly improved.
ISSN:1869-1951
2095-9184
1869-196X
2095-9230
DOI:10.1631/jzus.C1200333